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103 lines
4.0 KiB
103 lines
4.0 KiB
/* |
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* An implementation of the TwoFish algorithm |
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* Copyright (c) 2015 Supraja Meedinti |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/log.h" |
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#include "libavutil/twofish.h" |
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#include <stdio.h> |
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#include <stdlib.h> |
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int main(int argc, char *argv[]) |
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{ |
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uint8_t Key[32] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff |
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}; |
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const uint8_t rct[6][16] = { |
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{0x9f, 0x58, 0x9f, 0x5c, 0xf6, 0x12, 0x2c, 0x32, 0xb6, 0xbf, 0xec, 0x2f, 0x2a, 0xe8, 0xc3, 0x5a}, |
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{0xcf, 0xd1, 0xd2, 0xe5, 0xa9, 0xbe, 0x9c, 0xdf, 0x50, 0x1f, 0x13, 0xb8, 0x92, 0xbd, 0x22, 0x48}, |
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{0x37, 0x52, 0x7b, 0xe0, 0x05, 0x23, 0x34, 0xb8, 0x9f, 0x0c, 0xfc, 0xca, 0xe8, 0x7c, 0xfa, 0x20}, |
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{0x5d, 0x9d, 0x4e, 0xef, 0xfa, 0x91, 0x51, 0x57, 0x55, 0x24, 0xf1, 0x15, 0x81, 0x5a, 0x12, 0xe0}, |
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{0xe7, 0x54, 0x49, 0x21, 0x2b, 0xee, 0xf9, 0xf4, 0xa3, 0x90, 0xbd, 0x86, 0x0a, 0x64, 0x09, 0x41}, |
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{0x37, 0xfe, 0x26, 0xff, 0x1c, 0xf6, 0x61, 0x75, 0xf5, 0xdd, 0xf4, 0xc3, 0x3b, 0x97, 0xa2, 0x05} |
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}; |
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uint8_t temp[32], iv[16], rpt[32] = {0}; |
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const int kbits[3] = {128, 192, 256}; |
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int i, j, k, err = 0; |
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struct AVTWOFISH *cs; |
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cs = av_twofish_alloc(); |
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if (!cs) |
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return 1; |
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for (j = 1; j < 3; j++) { |
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av_twofish_init(cs, Key, kbits[j]); |
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av_twofish_crypt(cs, temp, rpt, 1, NULL, 0); |
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for (i = 0; i < 16; i++) { |
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if (rct[j][i] != temp[i]) { |
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct[j][i], temp[i]); |
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err = 1; |
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} |
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} |
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av_twofish_crypt(cs, temp, rct[j], 1, NULL, 1); |
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for (i = 0; i < 16; i++) { |
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if (rpt[i] != temp[i]) { |
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rpt[i], temp[i]); |
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err = 1; |
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} |
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} |
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} |
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for (j = 0; j < 3; j++) { |
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memset(Key, 0, sizeof(Key)); |
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memset(rpt, 0, sizeof(rpt)); |
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for (i = 1; i < 50; i++) { |
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av_twofish_init(cs, Key, kbits[j]); |
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av_twofish_crypt(cs, temp, rpt, 1, NULL, 0); |
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memcpy(Key+16,Key,(kbits[j]-128) >> 3); |
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memcpy(Key,rpt,16); |
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memcpy(rpt,temp,16); |
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av_twofish_crypt(cs, temp, temp, 1, NULL, 1); |
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for (k = 0; k < 16; k++) { |
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// Need to compare to Key here, because the plaintext comes |
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// from rpt but was moved over to Key. |
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if (Key[k] != temp[k]) { |
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", k, Key[k], temp[k]); |
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err = 1; |
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} |
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} |
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} |
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for (i = 0; i < 16; i++) { |
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if (rct[3 + j][i] != rpt[i]) { |
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct[3 + j][i], rpt[i]); |
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err = 1; |
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} |
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} |
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} |
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memset(rpt, 0, sizeof(rpt)); |
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memcpy(iv, "HALLO123HALLO123", 16); |
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av_twofish_crypt(cs, temp, rpt, 2, iv, 0); |
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memcpy(iv, "HALLO123HALLO123", 16); |
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av_twofish_crypt(cs, temp, temp, 2, iv, 1); |
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for (i = 0; i < 32; i++) { |
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if (rpt[i] != temp[i]) { |
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rpt[i], temp[i]); |
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err = 1; |
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} |
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} |
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av_free(cs); |
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return err; |
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}
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